Harness-stop mechanism for looms



Feb. 19, 1929.

J. PUSVASKIS HARNESS STOP MECHANISM FOR LOOMS Filed 0%.30, 1927 2 Sheets-Sheet 1 Feb 19, 1929.

1,702,980 'J. PUSVASKIS HARNESS STOP MECHANISM FOR LOOIIS Filed Dec. 30, 1927 2 Sheets-Srieet 2 0E 31 I 22 21 I 25 Patented Feb. 19, 1929.

1 UNITED JOSEPH PUSVALSKIS, CHESTER, PENNSYLVANIA.

" -HAINESS-STOP MECHANISM FOR LOOMS.

. Application. filed December 30, 1927. Serial No. 243,521. l I

My invent-ion'-.rela tes to new and useful harness stop mechanismfor looms and it relates more particularly toa novel attachment of simple and inexpensive construction for' looms, which will automatically stop the loom in the event that a harness suppoit breaks-and the particular harness does not function properly. I

Conventional looms now in use are usually provided with weft or warp stop mechanisms, or both, by'means of which the loom is shut down, or stopped in the event of the breakage of either a warp or a weftthread, as thecase may be. i l/Vhile variousharness stop means have beendevised, yetnone of these harness stop means are applied to looms generally, because the breakage of the harness supports orstraps is not sufliciently frequent to warrant the addition of any expensive, and intricate mechanism to the loom, to guard against the operation of the loom in the event of an occasionally brokenharness support. I

In most instances ;.thecond'tion of the harness supports is left entirely to the constant care of the weaver,without any automatic safeguards. Q U 1 By my novel construction I have provided a very inexpensiveand yet entirely effectual means, which can readilybeapplied to any conventional loom having either a Weft or a warp stop mechanism without any alterations on the loom whatsoever.

' For the purpose of illustrating my inven-' tion I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described. 1

In the accompanying drawings in which like reference characters represent like parts, Figure 1 represents a side elevational view, partly in section, of a conventional loom having the novel harness stop'mechanism of my novel construction appliedthereto.

Figure 2 represents a diagrammatic plan view of a series of harnesses and the novel stop mechanism of my novel construction.

Figure 3 represents a similar perspective view of the stopmechanism of my novel 0011- Y struction,-shown detached.

Y In the above drawingsI have shown the harness stop attachment of my novelconstruction applied to a conventional loom having warp stop mechanism of the type disclosed in U. S..Letters Patent No. 665,713. I

In the accompanying drawings, lis the end frame ofthe -loom;.2 isthe lay of theloom and 3 isthe reed. The upper frame member of the loom, or arch 1, carries pivot bolts 5, upon which are loosely mounted the seriesof harness sheaves 6, over which the flexible harness supports or straps 7 pass. Each of the series of harnesses 8 is supported from a pair of strap'ends 7, as shown particularly in-Figure 1, and are alternatelyraisedand lowered by harness operating mechanism, not shown. in the drawing, thereby to form the shed of the warp threads 9 carried by saidharnesses. V i

. r The rocker shaft 10 of the warp stop mechanism, carries a pair of opposed arms 11 which carry the vibrator bar 12 of the conventional warp stop mechanism.

In harnessstopmechanisms of this conventional form, the shipper lever or the shipping meohanismofthe' loom is operated whenever the normal oscillating-motion of the bar 12 is arrested, thereby stopping the loom.

According to my invention I secure to each of the side frame members 1 of the loom (Figures 2 and 3), a stud or support 13, upon any suitable bracket 14, at a point-slightly below the lowermost horizontal position of any of theharness frames (as indicated in Figure 1), and to one side of the harnesses. On the other side of the harnesses, at about the same horizontal level I secure corresponding guide brackets 15 having suitable guides 16.

.To each of the stationary studs 13 I secure one end17 of a flexible operating member 18, such as a leather or thin steel strap,

which are passed through the corresponding guides 16, thereby forming spans directly beneath and across the harnesses near the respective ends thereof, as shown particularly in Figure 2. I

The flexible members 18 then pass upwardly between the rocker shaft 10 and the oscillating bar 12, havingtheir upper free ends secured to resilient members such as the helical tension springs '19, the opposed ends of which in turn are fixedly secured to the] frame as at 20, thereby maintaining the flexible member 18 under suitable tension and thus maintaining beneath the harnesses a pair of opposed taut and yet yieldable spans extending between the terminal supporting studs 13 and the guides 16.

Each of the flexible members 18 carry corresponding arms 21 extending at a right the direction of the oscillating bar 12, will cause either ofsaid arms 21 to engage and to arrest the motion of the oscillating bar 12, thereby to stop the loom through the operation of the shipper lever or shipping mecha nism (not shown in the drawing).

In operation, if any one of the harnesses 8 falls below its lowermost normal position, it falls directly upon the taut span of either one or both of the two flexible members 18, and will cause said span between the fixed supporting stud 13 and guide 16 to and thereby to draw the corresponding arm 21 towards the oscillating bar 12, against the tension of the spring 19. Thus, if any one or more of the harnesses 8 fall below their normal lowermost position at either or both ends thereof the loom will be automatically stopped and thus damage to the woven product entirely avoided.

I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, references being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In a loom having harnesses and an automatic stop mechanism controlled by the breakage of threads including a normally moving part, the stoppage of which causes the stoppage of the loom, a limp and flexible member beneath the lowermost positions of the harnesses and extending transversely thereof, having one end thereof fixedly supported and having the other end thereof yieldably supported, and means carried by the yieldably supported end of said flexible member for arresting the motion of said normally moving part, upon the falling of a harness upon said flexible member.

2. In a loom having harnesses and an automatic stop mechanism controlled by the breakage of threads, including a normally moving part, the stoppage of which causes the stoppage of the loom, a limp and flexible member beneath the lowermost positions of v the harnesses and extending transversely thereof, having one end thereof fixedly supported and having the other end thereof yieldably supported, and an arm adjustably secured to, and carried by the yieldably sup ported end of said flexible member, for ar resting the motion of said normally moving part, upon the falling of a harness upon said flexible member.

In testimony whereof, I have hereunto set my hand this 14th day of October, 1927.

JOSEPH PUSVASKIS. 

